package c5.Example08;

import com.sun.org.apache.xpath.internal.operations.String;

public class example08 {
    public static void main(String[] args) {
        System.out.println("1、添加------------");
        add();
        System.out.println("2、删除-------------");
        remove();
        System.out.println("3、修改--------------");
        alter();
    }
    public static void  add(){
        StringBuffer sb = new StringBuffer();
        sb.append("itcast");
        System.out.println("append添加结果："+sb);
        sb.insert(2,"123");
        System.out.println("insert添加结果："+sb);
    }
    public static void remove(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.delete(1,5);
        System.out.println("删除指定位置结果："+sb);
        sb.deleteCharAt(2);
        System.out.println("删除指定位置结果："+sb);
        sb.delete(0,sb.length());
        System.out.println("清空缓冲区结果："+sb);
    }
    public static void alter(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("修改指定位置字符结果："+sb);
        sb.replace(1,3,"qq");
        System.out.println("替换指定位置字符(串)结果："+sb);
        System.out.println("字符串反转结果："+sb.reverse());
    }
}
